Generac RXSC100A3 Generator Set

1. Verify generator is OFF.
2. Set the utility service disconnect circuit breaker of the transfer switch to OFF or OPEN.
3. Verify switch is de-energized.
4. Install front cover of the transfer switch.
5. Set the utility service disconnect circuit breaker of the transfer switch to ON or CLOSED.
6. Set the generator main circuit breaker to ON.
7. On the generator panel, select AUTO.
8. Set the utility service disconnect circuit breaker of the transfer switch to OFF or OPEN.

⚠ DO NOT OVERLOAD.

Tools: Voltmeter, Frequency meter

1. Set the generator main circuit breaker to OFF or OPEN.
2. Set the utility service disconnect circuit breaker to OFF or OPEN, and turn OFF all load circuit breakers.
3. Manually actuate the transfer switch main contacts to the emergency (standby) position.
4. Select MANUAL mode to start the generator; let it stabilize for a few minutes.
5. Set the generator main circuit breaker to ON or CLOSED.
6. Turn on electrical loads to the full rated wattage/amperage capacity of the generator. DO NOT OVERLOAD.
7. With maximum rated load applied, check voltage and frequency across transfer switch terminals E1 and E2.
8. Let the generator run under rated load for at least 30 minutes.
9. Set main circuit breaker of the generator to the OFF or OPEN position.
10. Let the generator run at no-load for several minutes, then shut down by selecting the OFF mode.
11. Move the main switch contacts back to the utility position.
12. Set the utility service disconnect circuit breaker of the transfer switch to ON or CLOSED.

⚠ Electrocution. High voltage is present at transfer switch and terminals.

Tools: Accurate AC voltmeter, Frequency meter

1. On the generator panel, select the MANUAL mode of operation.
2. Let the generator stabilize and warm up at no-load for at least five minutes.
3. Set the generator's main circuit breaker (CB1) to its ON or CLOSED position.
4. Check the no-load voltage and frequency across ATS terminal lugs E1 to E2; E1 to NEUTRAL and E2 to NEUTRAL.
5. When generator supply voltage is correct, turn OFF the generator supply to the transfer switch.
6. Set the generator main circuit breaker (CB1) to OFF or OPEN.
7. On the generator panel, select the OFF mode to shut down the generator.

1. Turn on the utility supply to the ATS.
2. Verify managed loads are powered and all LEDs illuminate on SACM.
3. Press the TEST button on the SACM.
4. Verify that all of the connected loads to be shed become disabled.
5. After five (5) minutes verify A/C 1 is energized and Status LED A/C 1 is ON.
6. After another 15 seconds, verify A/C 2 is energized and Status LED A/C 2 is ON.
7. After another 15 seconds, verify Load A/C 3 is energized and Status LED Load A/C 3 is ON.
8. After another 15 seconds, verify A/C 4 is energized and Status LED A/C 4 is ON.

⚠ Electrocution. High voltage is present at transfer switch and terminals.

Tools: Accurate AC voltmeter, Digital Multimeter (DMM) with LowZ setting

1. Turn ON the utility power supply to the transfer switch using the utility service disconnect circuit breaker.
2. With an accurate AC voltmeter, check for correct voltage across ATS terminal lugs N1 and N2; N1 to NEUTRAL and N2 to NEUTRAL.

⚠ Electrocution. Turn utility and emergency power supplies to OFF before connecting power source and load lines.

⚠ A jumper wire (B) bonds the upper and lower Neutral lugs. NEVER remove this wire.

1. Connect utility supply at the utility service disconnect circuit breaker terminals N1 and N2.
2. Connect utility neutral and ground to the Upper Neutral and Ground terminals.
3. Connect generator to the generator terminals (E1 and E2) on the transfer mechanism.
4. Connect the generator neutral wire to the lower neutral lug.
5. Connect a subpanel supply to lower T1 and T2 Terminals.

⚠ Inner Panel only available in models that are Service Entrance Rated.

1. Remove thumb screw (B).
2. Slide slot (C) over retention tab.
3. Lower cover until clear of top flange (D), and pull away from enclosure.
4. Loosen nut (F) until it clears t-slot (H) in inner panel.
5. Grasp inner panel at two cutouts (G) and tilt panel, passing nut through t-slot.
6. Lower inner panel until clear of two retention slots (J), and pull away from enclosure.

⚠ Automatic start-up. Disconnect utility power and render unit inoperable before working on unit.

1. At the controller, turn the generator OFF.
2. Set the MLCB (generator disconnect) on the generator to OFF (OPEN).
3. Turn the main utility disconnect OFF (OPEN).
4. Remove 7.5A fuse from the controller.
5. Follow maintenance procedure(s).
6. Turn the main utility disconnect ON (CLOSED).
7. Install 7.5A fuse in controller.
8. Put the generator into AUTO mode.
9. Set the MLCB (generator disconnect) on the generator to ON (CLOSED).

Tools: Fuse removal and installation tool, Diagonal pliers

1. Snap the fuse removal and installation tool free with an appropriate tool such as diagonal pliers.
2. Use it to replace the fuse.
3. Store the tool in the SACM housing retainer directly above the fuses, with the large thumb tab facing out.

Tools: Manual operating handle

1. Verify switch position by observing manual operation handle.
2. With the handle inserted into the movable contact carrier arm, move the handle DOWN.
3. Remove manual operating handle from movable contact carrier arm. Return handle to storage bracket.

Tools: Manual operating handle

1. Verify switch position by observing manual operation handle.
2. With the handle inserted into the movable contact carrier arm, move handle UP.
3. Remove manual operating handle from movable contact carrier arm. Return handle to storage bracket.

⚠ Electrocution. Do not manually transfer under load.

Tools: Manual operating handle

1. Verify the generator is in the OFF mode.
2. Turn OFF both utility and emergency power supplies to the transfer switch.
3. Note position of transfer mechanism main contacts (A) by observing the movable contact carrier arm.
4. With handle inserted, move handle to the desired position.